extrusive
Example Sentences
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These are known as fine-grained extrusive, or volcanic, igneous rocks.
From Textbooks • Jan. 1, 2017
When lava is extruded onto the surface, or intruded into shallow fissures near the surface and cools, the resulting igneous rock is called extrusive or volcanic.
From Textbooks • Jan. 1, 2017
In some cases, extrusive lava cools so rapidly it does not develop crystals at all.
From Textbooks • Jan. 1, 2017
Basalt and gabbro are the extrusive and intrusive names for mafic igneous rocks, and peridotite is ultramafic, with komatiite as the fine-grained extrusive equivalent.
From Textbooks • Jan. 1, 2017
When magmas reach the surface red hot, they form extrusive rocks, such as volcanic rocks.
From Let's Collect Rocks and Shells by Shell Union Oil Corporation
Vocabulary lists containing extrusive
Physical Geography - High School
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Earth Science - Middle School
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Rocks and Minerals - Introductory
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